I’ve got a feeling the shooter is some disgruntled person with a beef about something. The kids that I heard interviewed were all lucid, well adjusted. Also of faith. Whoever this dirtbag was, he caused great harm to people that were truly having a healthy good time.
Motives -not ordered based upon probability:
1. Disgruntled employee or bullied student
2. Muzzie carrying out jihad
3. Love triangle / suicide
4. Lib-Prog enacting revenge
5. Random insanity